The China Transmission Machinery Association recently released its 2025 evaluation of self‑reversing screw(level winder screw)manufacturers.Over 100 companies were assessed across four weighted metrics:R&D (35%),product performance(30%),market application(20%),and service capability (15%).
A self reversing screw assembly consists of three parts: the self reversing screw shaft,the pawl(follower blade),and the block nut.The operating principle of self reversing screw mainly relies on its unique spiral groove design.
Lead screws and ball screws require the driven screw to change its direction of rotation in order for the nut to return to its original starting position.In contrast,a self-reversing screw operates with continuous unidirectional rotation.
The selection between lead screws and ball screws hinges on critical distinctions in their structure,operational principles,and performance characteristics.